Bump defu from 6.1.4 to 6.1.6 in /bindings/js #565

Job	Run time
Test (macos-latest / Node 20.x)	42s
Test (macos-latest / Node 24.x)	37s
Test (ubuntu-latest / Node 20.x)	40s
Test (windows-latest / Node 24.x)	1m 59s
Test (windows-latest / Node 20.x)	2m 30s
Test (ubuntu-latest / Node 24.x)	40s
Test (windows-latest / Node 22.x)	2m 5s
Test (ubuntu-latest / Node 22.x)	36s
Test (macos-latest / Node 22.x)	42s
Prebuild (${{ matrix.goos }}/${{ matrix.goarch }})	0s
Package and publish	0s
	10m 31s

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